Old Man's War

In John Scalzi's Old Man's War, seventy-five-year-old John Perry joins the army seeking a new beginning, undergoing a transformative process that grants him a genetically enhanced body for space combat. As Perry faces the perils of defending humanity's colonies from hostile aliens, he encounters the dangers of a universe far more threatening than he had imagined. The story offers a thrilling glimpse into the realities of a high-stakes interstellar conflict.